JAVA CODE FOR TCP FILE TRANSFER

PROGRAM: (SERVER)

import java.net.*;

import java.io.*;

import java.util.*;

class FileTcpServer

{

public static void main(String a[])throws IOException

{

BufferedReader din=new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter Source Filename::  ");

String sf=din.readLine();

String str=" ";

File srcf=new File(sf);

if(!srcf.exists() )

{

System.out.println(sf + "File not Found!!");

return;

}

FileInputStream fin=new FileInputStream(srcf);

int len=fin.available();

byte ch[]=new byte[len];

try

{

ServerSocket ss=new ServerSocket(3000);

while(fin.available() >0 )

{

Socket sock=ss.accept();

PrintWriter bw=new PrintWriter(sock.getOutputStream(),true);

fin.read(ch,0,len);

str=new String(ch,0,len);

System.out.println(str);

bw.println(str);

System.out.println(len);

sock.close();

}

}

catch(Exception e)

{         

}

fin.close();

}

}

PROGRAM: (CLIENT)

import java.net.*;

import java.io.*;

import java.util.*;

class FileTcpClient

{

public static void main(String a[])throws IOException

{

String str=" ";

BufferedReader din=new BufferedReader(new InputStreamReader(System.in));

System.out.println("Enter Destination Filename::  ");

String df=din.readLine();

File dstf=new File(df);

if(!dstf.exists() )

{

System.out.println(df + "File already Exists!!");

return;

}

FileOutputStream fout=new FileOutputStream(dstf);

try

{

Socket sock=new Socket(InetAddress.getByName("  "),3000);

DataInputStream br=new DataInputStream(sock.getInputStream());

int len=2341;

while(true )

{

byte buff[]=new byte[len];

br.read(buff,0,len);

str=new String(buff,0,len);

fout.write(buff);

System.out.println(str);

sock.close();

}                     

}

catch(Exception e)

{

}

fout.close();

}

}

OUTPUT: (SERVER)

Enter Source Filename::

Test1.java

OUTPUT: (CLIENT)

Enter Destination Filename::

Test2.java